Patch was released:
v1093
2017.04.27
RX500 fix sets highest dpm state in memory. Before that update RX500 were mining much slower.
RX500 are working fine !

this sgminer 5.5.5 isnt the lates on my SMOS ?

Also about Z170 chipsets, i saw on ethos some nice informations. http://ethosdistro.com/kb/#many-gpus
I dont have any Z170 for tests but i have Z270-A PRO MSI with has no problems at all with 6 GPUS RX570.

Has anyone gotten RX570 with MOD BIOS to work on SMOS?  If so, please PM me.  Thanks

What core and mem settings are you using for Gigabyte 570 on the dashboard? If I use 1244 and 1750, my 6 Gigabyte hangs at

============ Preparing miners =============
============ OVERCLOCKING =================
GPU0:

If I leave the core and mem field blank, GPUs hash between 90-180 sols. Is there an optimal settings, or an update is required? I am using MSI Z97 Gaming 5 MB, and it ran 7 GPUs in the past without any issues.

Thanks.

Yes, look two threads up
I need to release fix. it will be today.